However, factors such as low octane fuel, lack of engine maintenance, and rich or lean running conditions will all cause your spark plugs to be consumed quicker. You could expect low-end plugs to last from 15,000 to 30,000kms while high-quality iridium plugs might last up to 180,000kms or more. Your vehicle’s manufacturer will recommend at what mileage your spark plugs need to be replaced and what type to use during normal driving conditions. How often do you need to change spark plugs and why do you need to change them? A vibration through the car, a ‘rough’ sound, and the sensation that your engine might stall are signs of spark plug issues. ROUGH IDLING A misfiring spark plug creates a rough ride when the car is being driven, and a similar feeling will be obvious when your car is at idle.PERFORMANCE A worn or damaged spark plug will lead to sluggish acceleration – a symptom that is, once again, very noticeable.INCREASED FUEL CONSUMPTION If a spark plug is worn or damaged – when, for instance, the gap between the plug’s electrodes changes – it can lead to less efficient combustion and an increase, often a very noticeable increase, in fuel consumption.It seems obvious then, that if you’ve got dodgy spark plugs, you’ll have a problem starting your car. STARTING Spark plugs are part of the ignition system of the engine.This may be caused by a misfire of one or more spark plugs.
The drivability – the smoothness and steadiness of the driving experience - becomes rough and you will be able to feel the engine hesitate and stumble.
Its job is to ignite the air/fuel mixture in the engine combustion chamber – and do so at precisely the right time. The spark plug is a vital component in a petrol driven engine.
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